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Orientating monitoring device and method for drilling stress

A monitoring device and stress technology, which is applied in the field of drilling stress directional monitoring devices, can solve the problems of inability to control the direction of the stress sensor, the inability to accurately measure the drilling stress, and the tortuous drilling path, etc., and achieve simple structure, high reliability, The effect of saving

Inactive Publication Date: 2018-12-07
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, because the drill holes in the coal roadway are drilled with short drill pipes, the drilling path is tortuous, and there is a lot of coal ash. When the traditional drilling stress gauge is pushed inward, it cannot control the direction of the stress sensor. Accurately measure the drilling stress in the specified direction

Method used

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  • Orientating monitoring device and method for drilling stress
  • Orientating monitoring device and method for drilling stress

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: the testing device comprises a stress data acquisition instrument 1, a lead 2, a stress sensor 3, a direction control device and a protective case; the stress sensor 3 is connected to the stress data acquisition instrument 1 by a lead 2, and the direction control device is installed on the stress sensor 3, the protective shell is installed outside the direction control device.

[0029] The direction control device includes two bearings 4 and a counterweight 5; the two bearings 4 are fixed at both ends of the stress sensor 3 to keep the stress sensing area on the stress sensor 3 in the process of advancing the equipment into the borehole The middle direction remains unchanged, the inner diameter of bearing 4 should be slightly larger than the outer diameter of stress sensor 3, and the steel ball in bearing 4 should be protected. Actual effect: the counterweight 5 is an iron block with a suitable size, and by fixing the counterweight 5 on one side of the str...

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Abstract

The invention discloses an orientating monitoring device and method for drilling stress. The device is composed of a pressure data collecting instrument, a wire, a pressure sensor, a direction controldevice and a protective shell. The direction control device is composed of a bearing and a counter weight; the protective shell is composed of a cut PVC tube and a steel wire net. Through the counterweight, the testing direction of the stress is determined; through the direction control device, the pressure sensor is kept unchanged in direction when pushed into a drilled hole, and then the direction and intensity of the stress of the drilled hole in a coal roadway are measured accurately. The structure and the method are simple, on-site operation is easy, the dynamic change of the intensityof the stress of the drilled hole can be monitored in real time, and the stress of the drilled hole is tested and evaluated in real time.

Description

technical field [0001] The invention relates to a device and method for measuring drilling stress of rock mass, in particular to a device and method for directional monitoring of drilling stress. Background technique [0002] my country is rich in coal resources and distributed in a vast area. During the mining process, stress redistribution will be caused to generate mining stress. Accurate measurement of the size and direction of mining stress is a prerequisite for selecting support methods and ensuring mining safety. In the 21st century, the mining of shallow mineral resources in the world is gradually exhausted, and the mining of mineral resources at home and abroad is gradually shifting to deep, and the number of kilometer-deep mines is gradually increasing. At present, deep mining activities are ahead of the basic theoretical research of deep mining, and the basic theory specifically for deep resources has not been established. Therefore, the innovative development of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B47/017
CPCE21B47/00E21B47/017
Inventor 刘泽霖周宏伟张雷赵芷迎任伟光薛东杰
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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